Microcellular foam shoe sole and process for making same
Patent Information
- Application Number
- CN202610941012.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-06-27
- Publication Date
- 2026-08-18
AI Technical Summary
[0002]鞋子是人们日常生活中不可或缺的生活用品，其常见作用是用于保护脚部免受外界环境的伤害和使行走的安全性得到保障，而随着生活水平的提高，人们对鞋子的功能要求也越来越多，市场上出现了普通生活鞋、劳动保护鞋、运动鞋、旅游鞋、增高鞋、减震鞋等，对于减震鞋现有的结构都是通过在鞋底中增加气囊来实现的，现有鞋底气囊主要方式是先生产出具体形状的鞋底，然后在鞋底底部另外加装气囊来实现的，这种气囊鞋底的缺陷在于，鞋底和气囊两个部件组装费时费力，鞋底形状规格多样、相配合的气囊也要有多种，两者相互独立制造后才能装配，给组装带来更多的麻烦
[0014] The initial shoe sole of this invention has a pre-reserved air chamber. The modified hollow glass microspheres in the masterbatch are chemically linked through silane coupling agents, organosilicon resins, and the hollow glass microspheres, which improves the interfacial adhesion and surface roughness of the masterbatch. The shell of the modified hollow glass microspheres has a certain compressive strength and, to a certain extent, plays a supporting role for the inorganic skeleton filler. As the foaming and expansion air chambers expand into air bladders, impact energy can be more effectively transmitted, transferred, and dispersed at the interface, triggering synergistic effects such as microsphere compression and matrix plastic deformation, which improves the elasticity and toughness of the air-bladder foamed shoe sole. In addition, hollow fibers, due to their high specific surface area, high packing density, and good mechanical strength, become an ideal support. The support contains a large number of finger-like pores, and its porous characteristics facilitate gas transport through adsorption. Gas molecules are adsorbed into the shoe sole air chambers through chemical action or van der Waals forces and diffuse along the surface, effectively achieving air venting inside the shoe and keeping the shoe cavity clean.
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Figure SMS_1
Abstract
Description
Technical Field
[0001] This invention relates to the field of footwear, specifically to a micro-airbag-type foamed shoe sole and its manufacturing process. Background Technology
[0002] Shoes are an indispensable part of daily life, primarily serving to protect feet from environmental damage and ensure walking safety. As living standards improve, people have increasingly higher functional requirements for shoes, leading to the emergence of various types on the market, including everyday shoes, work shoes, athletic shoes, hiking shoes, height-increasing shoes, and shock-absorbing shoes. Current shock-absorbing shoes typically achieve this by adding air bladders to the sole. The existing method involves first manufacturing the sole to a specific shape and then adding the air bladder separately. The drawback of this method is that assembling the sole and air bladder is time-consuming and labor-intensive. The diverse shapes and specifications of the soles and the various types of air bladders required, along with the need for independent manufacturing of both components, complicates the assembly process. Therefore, it is necessary to develop an air bladder sole that incorporates the air bladder during the sole manufacturing process, eliminating the need for separate installation. Summary of the Invention
[0003] In view of this, the purpose of the present invention is to provide a micro-airbag foam shoe sole and its manufacturing process, which has good elasticity and shock absorption effect, and has a certain mechanical strength.
[0004] To achieve the above objectives, the present invention provides the following technical solution: A micro-inflatable foamed shoe sole comprises the following components in parts by weight: 50-60 parts by weight of epoxy resin, 40-50 parts by weight of thermoplastic elastomer, 10-15 parts by weight of polyurethane-acrylate copolymer, 15-20 parts by weight of modified hollow glass microspheres, 15-20 parts by weight of zinc oxide hollow fiber, 6-10 parts by weight of polyimide, 2-5 parts by weight of stearic acid, 3-6 parts by weight of vinyl silicone oil, 3-6 parts by weight of ethylenediaminetetraacetic acid, 4-6 parts by weight of zinc stearate, 1-3 parts by weight of magnesium oxide, and 1-3 parts by weight of AC foaming agent.
[0005] A manufacturing process for a micro-airbag-type foamed shoe sole includes the following steps: S1: Epoxy resin, thermoplastic elastomer, polyurethane-acrylate copolymer, modified hollow glass microspheres, zinc oxide hollow fiber, polyimide, stearic acid, vinyl silicone oil, ethylenediaminetetraacetic acid, zinc stearate, magnesium oxide and AC foaming agent are mixed in an internal mixer, then AC foaming agent is added and the mixing continues. After open milling, the mixture is granulated and allowed to stand at room temperature for 48 hours to obtain molding masterbatch. S2: A grooved lower sole is formed between the middle mold and the lower mold. The upper mold, middle mold and lower mold are then closed to form a preliminary shoe sole with an air chamber. The molding masterbatch is placed into the inner mold of the preliminary shoe sole and pressed. The mold closing pressure is 22MPa. Then, the mold and foaming mold are heated to 165℃ and vulcanized for 17 minutes. The mold is then cooled and left to stand at room temperature for 24 hours to obtain a micro air-bag foamed shoe sole.
[0006] Preferably, the preparation process of the modified hollow glass microspheres in step S1 is as follows: the hollow glass microspheres are mixed with a 10% sodium hydroxide solution, stirred at 500-800 r / min for 1-2 h, filtered, and then washed with deionized water until the pH value is 7. Then, KH560 silane coupling agent and a 15% ethanol solution are added, stirred for 30-40 min, allowed to stand for 30-40 min, filtered, and dried to obtain the modified hollow glass microspheres.
[0007] Preferably, the weight ratio of the hollow glass microspheres, KH560 silane coupling agent, and ethanol solution is 1:1:10.
[0008] Preferably, the specific preparation process of the zinc oxide hollow fiber is as follows: polyethersulfone, N-methyl-2-pyrrolidone and polyvinylpyrrolidone are mixed and stirred for 36-48 hours, then zinc oxide is added and stirred for another 48-60 hours. The zinc oxide hollow fiber precursor is spun and extruded, and then placed in a box furnace and sintered at 1200-1300°C for 4-6 hours to obtain zinc oxide hollow fiber.
[0009] Preferably, the weight ratio of polyethersulfone, N-methyl-2-pyrrolidone, polyvinylpyrrolidone and zinc oxide is 2:5:2:2.
[0010] Preferably, the preparation process of the composite polyimide in step S1 includes the following steps: 2-(4-aminophenyl)-5-aminobenzimidazole, 4,4'-(hexafluoroisopropyl)diphthalic acid and N-methylpyrrolidone solvent were mixed and reacted at 200-220℃ for 5-6 h under a nitrogen atmosphere. The mixture was washed with anhydrous methanol, filtered, and dried to obtain polyimide.
[0011] Preferably, the weight ratio of 2-(4-aminophenyl)-5-aminobenzimidazole, 4,4'-(hexafluoroisopropylidene)diphthalic acid and N-methylpyrrolidone solvent is 1:1:2.
[0012] Preferably, in step S1, the temperature for intensive mixing is 78°C and the mixing time is 46 min; the temperature for compounding is 108°C and the compounding time is 8 min.
[0013] Preferably, the molding time in step S2 is 13 minutes.
[0014] The initial shoe sole of this invention has a pre-reserved air chamber. The modified hollow glass microspheres in the masterbatch are chemically linked through silane coupling agents, organosilicon resins, and the hollow glass microspheres, which improves the interfacial adhesion and surface roughness of the masterbatch. The shell of the modified hollow glass microspheres has a certain compressive strength and, to a certain extent, plays a supporting role for the inorganic skeleton filler. As the foaming and expansion air chambers expand into air bladders, impact energy can be more effectively transmitted, transferred, and dispersed at the interface, triggering synergistic effects such as microsphere compression and matrix plastic deformation, which improves the elasticity and toughness of the air-bladder foamed shoe sole. In addition, hollow fibers, due to their high specific surface area, high packing density, and good mechanical strength, become an ideal support. The support contains a large number of finger-like pores, and its porous characteristics facilitate gas transport through adsorption. Gas molecules are adsorbed into the shoe sole air chambers through chemical action or van der Waals forces and diffuse along the surface, effectively achieving air venting inside the shoe and keeping the shoe cavity clean. Detailed Implementation
[0015] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. In addition, it should be specifically noted that the raw materials and equipment of the present invention are all commercially available and will not be listed one by one. Among them, the raw materials of the present invention are all commercially available and well known to those skilled in the art, and will not be described in detail. Example 1
[0016] A micro-inflatable foamed shoe sole comprises the following components in parts by weight: 55 parts by weight of epoxy resin, 45 parts by weight of thermoplastic elastomer, 12 parts by weight of polyurethane-acrylate copolymer, 18 parts by weight of modified hollow glass microspheres, 18 parts by weight of zinc oxide hollow fiber, 8 parts by weight of polyimide, 3 parts by weight of stearic acid, 5 parts by weight of vinyl silicone oil, 5 parts by weight of ethylenediaminetetraacetic acid, 5 parts by weight of zinc stearate, 2 parts by weight of magnesium oxide, and 2 parts by weight of AC foaming agent.
[0017] A manufacturing process for a micro-airbag-type foamed shoe sole includes the following steps: S1: The above-mentioned parts by weight of epoxy resin, thermoplastic elastomer, polyurethane-acrylate copolymer, modified hollow glass microspheres, zinc oxide hollow fiber, polyimide, stearic acid, vinyl silicone oil, ethylenediaminetetraacetic acid, zinc stearate, magnesium oxide and AC foaming agent are mixed in an internal mixer. Then, AC foaming agent is added and mixing is continued. The mixing temperature is 78°C and the mixing time is 46 min. The mixing temperature is 108°C and the mixing time is 8 min. After open milling, the mixture is granulated and allowed to stand at room temperature for 48 h to obtain molding masterbatch. The specific preparation process of the modified hollow glass microspheres is as follows: Hollow glass microspheres are mixed with a 10% sodium hydroxide solution and stirred at 600 r / min for 1.5 h. After filtration, the mixture is washed again with deionized water until the pH value is 7. Then, KH560 silane coupling agent and a 15% ethanol solution are added. The weight ratio of hollow glass microspheres, KH560 silane coupling agent and ethanol solution is 1:1:10. The mixture is stirred for 35 min, allowed to stand for 35 min, filtered, and dried to obtain the modified hollow glass microspheres. The specific preparation process of zinc oxide hollow fiber is as follows: polyethersulfone, N-methyl-2-pyrrolidone and polyvinylpyrrolidone are mixed and stirred for 40 hours, then zinc oxide is added. The weight ratio of polyethersulfone, N-methyl-2-pyrrolidone, polyvinylpyrrolidone and zinc oxide is 2:5:2:2. Stirring is continued for 52 hours. Zinc oxide hollow fiber precursor is spun and extruded. The zinc oxide hollow fiber precursor is placed in a box furnace and sintered at 1250℃ for 5 hours to obtain zinc oxide hollow fiber. The preparation process of composite polyimide includes the following steps: 2-(4-aminophenyl)-5-aminobenzimidazole, 4,4'-(hexafluoroisopropylidene)diphthalic acid and N-methylpyrrolidone solvent are mixed in a weight ratio of 1:1:2, reacted at 210°C for 5.5 h under a nitrogen atmosphere, washed with anhydrous methanol, filtered, and dried to obtain polyimide; S2: A grooved lower sole is formed between the middle mold and the lower mold. The upper mold, middle mold and lower mold are then closed to form a preliminary shoe sole with an air chamber. The molding masterbatch is placed into the inner mold of the preliminary shoe sole and pressed. The mold closing pressure is 22MPa and the molding time is 13min. Then, the mold and foaming mold are heated to 165℃ and vulcanized for 17min. After cooling, the mold is left to stand at room temperature for 24h to obtain a micro air-bag foamed shoe sole. Example 2
[0018] A micro-inflatable foamed shoe sole comprises the following components in parts by weight: 50 parts by weight of epoxy resin, 40 parts by weight of thermoplastic elastomer, 10 parts by weight of polyurethane-acrylate copolymer, 15 parts by weight of modified hollow glass microspheres, 15 parts by weight of zinc oxide hollow fiber, 6 parts by weight of polyimide, 2 parts by weight of stearic acid, 3 parts by weight of vinyl silicone oil, 3 parts by weight of ethylenediaminetetraacetic acid, 4 parts by weight of zinc stearate, 1 part by weight of magnesium oxide, and 1 part by weight of AC foaming agent.
[0019] A manufacturing process for a micro-airbag-type foamed shoe sole includes the following steps: S1: The above-mentioned parts by weight of epoxy resin, thermoplastic elastomer, polyurethane-acrylate copolymer, modified hollow glass microspheres, zinc oxide hollow fiber, polyimide, stearic acid, vinyl silicone oil, ethylenediaminetetraacetic acid, zinc stearate, magnesium oxide and AC foaming agent are mixed in an internal mixer. Then, AC foaming agent is added and mixing is continued. The mixing temperature is 78°C and the mixing time is 46 min. The mixing temperature is 108°C and the mixing time is 8 min. After open milling, the mixture is granulated and allowed to stand at room temperature for 48 h to obtain molding masterbatch. The specific preparation process of the modified hollow glass microspheres is as follows: Hollow glass microspheres are mixed with a 10% sodium hydroxide solution and stirred at 500 r / min for 1 h. After filtration, the mixture is washed again with deionized water until the pH value is 7. Then, KH560 silane coupling agent and a 15% ethanol solution are added. The weight ratio of hollow glass microspheres, KH560 silane coupling agent and ethanol solution is 1:1:10. The mixture is stirred for 30 min, allowed to stand for 30 min, filtered, and dried to obtain the modified hollow glass microspheres. The specific preparation process of zinc oxide hollow fiber is as follows: polyethersulfone, N-methyl-2-pyrrolidone and polyvinylpyrrolidone are mixed and stirred for 36 hours, then zinc oxide is added. The weight ratio of polyethersulfone, N-methyl-2-pyrrolidone, polyvinylpyrrolidone and zinc oxide is 2:5:2:2. Stirring is continued for 48 hours. Zinc oxide hollow fiber precursor is spun and extruded. The zinc oxide hollow fiber precursor is placed in a box furnace and sintered at 1200℃ for 4 hours to obtain zinc oxide hollow fiber. The preparation process of composite polyimide includes the following steps: 2-(4-aminophenyl)-5-aminobenzimidazole, 4,4'-(hexafluoroisopropylidene)diphthalic acid and N-methylpyrrolidone solvent are mixed in a weight ratio of 1:1:2, reacted at 200°C for 5 h under a nitrogen atmosphere, washed with anhydrous methanol, filtered, and dried to obtain polyimide; S2: A grooved lower sole is formed between the middle mold and the lower mold. The upper mold, middle mold and lower mold are then closed to form a preliminary shoe sole with an air chamber. The molding masterbatch is placed into the inner mold of the preliminary shoe sole and pressed. The mold closing pressure is 22MPa and the molding time is 13min. Then, the mold and foaming mold are heated to 165℃ and vulcanized for 17min. After cooling, the mold is left to stand at room temperature for 24h to obtain a micro air-bag foamed shoe sole. Example 3
[0020] A micro-inflatable foamed shoe sole comprises the following components in parts by weight: 60 parts by weight of epoxy resin, 50 parts by weight of thermoplastic elastomer, 15 parts by weight of polyurethane-acrylate copolymer, 20 parts by weight of modified hollow glass microspheres, 20 parts by weight of zinc oxide hollow fiber, 10 parts by weight of polyimide, 5 parts by weight of stearic acid, 6 parts by weight of vinyl silicone oil, 6 parts by weight of ethylenediaminetetraacetic acid, 6 parts by weight of zinc stearate, 3 parts by weight of magnesium oxide, and 3 parts by weight of AC foaming agent.
[0021] A manufacturing process for a micro-airbag-type foamed shoe sole includes the following steps: S1: The above-mentioned parts by weight of epoxy resin, thermoplastic elastomer, polyurethane-acrylate copolymer, modified hollow glass microspheres, zinc oxide hollow fiber, polyimide, stearic acid, vinyl silicone oil, ethylenediaminetetraacetic acid, zinc stearate, magnesium oxide and AC foaming agent are mixed in an internal mixer. Then, AC foaming agent is added and mixing is continued. The mixing temperature is 78°C and the mixing time is 46 min. The mixing temperature is 108°C and the mixing time is 8 min. After open milling, the mixture is granulated and allowed to stand at room temperature for 48 h to obtain molding masterbatch. The specific preparation process of the modified hollow glass microspheres is as follows: Hollow glass microspheres are mixed with a 10% sodium hydroxide solution and stirred at 800 r / min for 2 h. After filtration, the mixture is washed again with deionized water until the pH value is 7. Then, KH560 silane coupling agent and a 15% ethanol solution are added. The weight ratio of hollow glass microspheres, KH560 silane coupling agent and ethanol solution is 1:1:10. The mixture is stirred for 40 min, allowed to stand for 40 min, filtered, and dried to obtain the modified hollow glass microspheres. The specific preparation process of zinc oxide hollow fiber is as follows: polyethersulfone, N-methyl-2-pyrrolidone and polyvinylpyrrolidone are mixed and stirred for 48 hours, then zinc oxide is added. The weight ratio of polyethersulfone, N-methyl-2-pyrrolidone, polyvinylpyrrolidone and zinc oxide is 2:5:2:2. Stirring is continued for 60 hours. Zinc oxide hollow fiber precursor is spun and extruded. The zinc oxide hollow fiber precursor is placed in a box furnace and sintered at 1300℃ for 6 hours to obtain zinc oxide hollow fiber. The preparation process of composite polyimide includes the following steps: 2-(4-aminophenyl)-5-aminobenzimidazole, 4,4'-(hexafluoroisopropylidene)diphthalic acid and N-methylpyrrolidone solvent are mixed in a weight ratio of 1:1:2, reacted at 220°C for 6 hours under a nitrogen atmosphere, washed with anhydrous methanol, filtered, and dried to obtain polyimide; S2: A grooved lower sole is formed between the middle mold and the lower mold. The upper mold, middle mold and lower mold are then closed to form a preliminary shoe sole with an air chamber. The molding masterbatch is placed into the inner mold of the preliminary shoe sole and pressed. The mold closing pressure is 22MPa and the molding time is 13min. Then, the mold and foaming mold are heated to 165℃ and vulcanized for 17min. After cooling, the mold is left to stand at room temperature for 24h to obtain a micro air-bag foamed shoe sole. Comparative Example 1:
[0022] The preparation process of Comparative Example 1 is basically the same as that of Example 1, except that modified hollow glass microspheres and zinc oxide hollow fibers are not used. Specifically: A micro-inflatable foamed shoe sole comprises the following components in parts by weight: 55 parts by weight of epoxy resin, 45 parts by weight of thermoplastic elastomer, 12 parts by weight of polyurethane-acrylate copolymer, 8 parts by weight of polyimide, 3 parts by weight of stearic acid, 5 parts by weight of vinyl silicone oil, 5 parts by weight of ethylenediaminetetraacetic acid, 5 parts by weight of zinc stearate, 2 parts by weight of magnesium oxide, and 2 parts by weight of AC foaming agent.
[0023] A manufacturing process for a micro-airbag-type foamed shoe sole includes the following steps: S1: The above-mentioned parts by weight of epoxy resin, thermoplastic elastomer, polyurethane-acrylate copolymer, polyimide, stearic acid, vinyl silicone oil, ethylenediaminetetraacetic acid, zinc stearate, magnesium oxide and AC foaming agent are mixed in an internal mixer. Then, AC foaming agent is added and mixing is continued. The mixing temperature is 78°C and the mixing time is 46 min. The mixing temperature is 108°C and the mixing time is 8 min. After open milling, the mixture is granulated and allowed to stand at room temperature for 48 h to obtain molding masterbatch. The preparation process of composite polyimide includes the following steps: 2-(4-aminophenyl)-5-aminobenzimidazole, 4,4'-(hexafluoroisopropylidene)diphthalic acid and N-methylpyrrolidone solvent are mixed in a weight ratio of 1:1:2, reacted at 210°C for 5.5 h under a nitrogen atmosphere, washed with anhydrous methanol, filtered, and dried to obtain polyimide; S2: A grooved lower sole is formed between the middle mold and the lower mold. The upper mold, middle mold and lower mold are then closed to form a preliminary shoe sole with an air chamber. The molding masterbatch is placed into the inner mold of the preliminary shoe sole and pressed. The mold closing pressure is 22MPa and the molding time is 13min. Then, the mold and foaming mold are heated to 165℃ and vulcanized for 17min. After cooling, the mold is left to stand at room temperature for 24h to obtain a micro air-bag foamed shoe sole.
[0024] The tensile strength, resilience, compression set, and shock absorption of the soles obtained in Examples 1-3, the commercially available soles from Baoding Chunli Shoe Insole Factory, and Comparative Example 1 were tested below.
[0025] Tensile strength: Tested in accordance with GB / T528-2009 "Determination of tensile stress-strain properties of vulcanized rubber or thermoplastic rubber".
[0026] Rebound rate: Tested in accordance with HG / T3869-2006 "Determination of compression or shear properties of rubber".
[0027] Air permeability: Tested according to GB / T 5453, gas pressure 100Pa, test area 8cm².
[0028] Vibration damping: The dynamic thermomechanical analysis test conditions and instrument names and models used in this invention are detailed below: (1) Sample size: 10mm×10mm×2mm (2) Testing instrument: Dynamic Mechanical Thermal Spectrometer (DMTS); Model: eplexor 500n (3) Test mode: Compression mode Test conditions: Frequency: 10Hz; Static strain: 5%; Dynamic strain: 0.5%; Heating rate: 2℃ / min; Heating range: -130℃ to 100℃.
[0029] Table 1: Test data of Examples 1-3, commercially available shoe soles, and the shoe sole of Comparative Example 1:
[0030] As can be seen from the table above, the soles of Examples 1-3 have better mechanical properties, higher rebound rate, better breathability, and excellent shock absorption strength than Comparative Example 1 and commercially available soles.
[0031] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A micro-airbag-type foamed shoe sole, characterized in that, It comprises the following components in parts by weight: 50-60 parts by weight of epoxy resin, 40-50 parts by weight of thermoplastic elastomer, 10-15 parts by weight of polyurethane-acrylate copolymer, 15-20 parts by weight of modified hollow glass microspheres, 15-20 parts by weight of zinc oxide hollow fiber, 6-10 parts by weight of polyimide, 2-5 parts by weight of stearic acid, 3-6 parts by weight of vinyl silicone oil, 3-6 parts by weight of ethylenediaminetetraacetic acid, 4-6 parts by weight of zinc stearate, 1-3 parts by weight of magnesium oxide, and 1-3 parts by weight of AC foaming agent.
2. A manufacturing process for a micro-airbag-type foamed shoe sole as described in claim 1, characterized in that, Includes the following steps: S1: Epoxy resin, thermoplastic elastomer, polyurethane-acrylate copolymer, modified hollow glass microspheres, zinc oxide hollow fiber, polyimide, stearic acid, vinyl silicone oil, ethylenediaminetetraacetic acid, zinc stearate, magnesium oxide and AC foaming agent are mixed in an internal mixer, then AC foaming agent is added and the mixing continues. After open milling, the mixture is granulated and allowed to stand at room temperature for 48 hours to obtain molding masterbatch. S2: A grooved lower sole is formed between the middle mold and the lower mold. The upper mold, middle mold and lower mold are then closed to form a preliminary shoe sole with an air chamber. The molding masterbatch is placed into the inner mold of the preliminary shoe sole and pressed. The mold closing pressure is 22MPa. Then, the mold and foaming mold are heated to 165℃ and vulcanized for 17 minutes. The mold is then cooled and left to stand at room temperature for 24 hours to obtain a micro air-bag foamed shoe sole.
3. The manufacturing process of the micro-airbag foamed shoe sole as described in claim 2, characterized in that: The specific preparation process of the modified hollow glass microspheres in step S1 is as follows: the hollow glass microspheres are mixed with a 10% sodium hydroxide solution and stirred at 500-800 r / min for 1-2 h. After filtration, the mixture is washed again with deionized water until the pH value is 7. Then, KH560 silane coupling agent and a 15% ethanol solution are added, stirred for 30-40 min, allowed to stand for 30-40 min, filtered, and dried to obtain the modified hollow glass microspheres.
4. The manufacturing process of the micro-airbag foamed shoe sole as described in claim 3, characterized in that: The weight ratio of the hollow glass microspheres, KH560 silane coupling agent, and ethanol solution is 1:1:
10.
5. The manufacturing process of the micro-airbag foamed shoe sole as described in claim 2, characterized in that: The specific preparation process of the zinc oxide hollow fiber is as follows: polyethersulfone, N-methyl-2-pyrrolidone and polyvinylpyrrolidone are mixed and stirred for 36-48 hours, then zinc oxide is added and stirred for another 48-60 hours. The zinc oxide hollow fiber precursor is spun and extruded. The zinc oxide hollow fiber precursor is placed in a box furnace and sintered at 1200-1300℃ for 4-6 hours to obtain zinc oxide hollow fiber.
6. The manufacturing process of the micro-airbag foamed shoe sole as described in claim 5, characterized in that: The weight ratio of polyethersulfone, N-methyl-2-pyrrolidone, polyvinylpyrrolidone and zinc oxide is 2:5:2:
2.
7. The manufacturing process of the micro-airbag foamed shoe sole as described in claim 2, characterized in that, The preparation process of the composite polyimide in step S1 includes the following steps: 2-(4-aminophenyl)-5-aminobenzimidazole, 4,4'-(hexafluoroisopropyl)diphthalic acid and N-methylpyrrolidone solvent were mixed and reacted at 200-220℃ for 5-6 h under a nitrogen atmosphere. The mixture was washed with anhydrous methanol, filtered, and dried to obtain polyimide.
8. The manufacturing process of the micro-airbag foamed shoe sole as described in claim 7, characterized in that: The weight ratio of the solvent 2-(4-aminophenyl)-5-aminobenzimidazole, 4,4'-(hexafluoroisopropylidene)diphthalic acid and N-methylpyrrolidone is 1:1:
2.
9. The manufacturing process of the micro-airbag foamed shoe sole as described in claim 2, characterized in that: In step S1, the temperature for intensive mixing is 78℃ and the mixing time is 46 minutes; the temperature for compounding is 108℃ and the compounding time is 8 minutes.
10. The manufacturing process of the micro-airbag foamed shoe sole as described in claim 2, characterized in that: The molding time in step S2 is 13 minutes.